Topic Scopes TOPIC 2 Chemical Bonding • • • • • Electrovalent Covalent bonding Co-ordinate/dative covalent bonding Metallic bonding Intermolecular bonding (including hydrogen bonding, Van der Waals) • Electronegativity 2 Chemical Bond Topic Scopes Bond energies, bond lengths & bond polarities Drawing Lewis structure and calculate the formal charge • Chemical bond the force of attraction that binds atoms together in a chemical compound • When atoms react
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How surface area affects the rate of diffusion. Hypothesis – the larger the surface area the faster the rate of reaction Why did you choose your hypothesis? The reason I have chosen my hypothesis is because large surface area of the tea bag will contain more molecules which means the rate of reaction will happen faster. For example the pyramid due to it 3D shape provides more sides for diffusion to take place and more area in the middle for the tea molecules to move around which will make
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to meet the needs of their customers. Issues Addressed DEP uses six companies to provide the raw materials for its polymers. They do this because they once experienced a supplier shortage. Now they use multiple suppliers for each of the chemical compounds that are used in their polymer. In addition they warehouse a
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Elements of a good ending; A Complicated Kindness and Kite Runner While writing a novel the writer must emphasize on the basic elements of ending the storyline. Efficient ending of a story answers the reader’s expectation of the story’s question. A good ending seals the reader’s impression of all they have read in the story. Therefore a good ending is necessary in writers doing literature writing as they motivate a reader to enjoy reading. There are four main elements which guide a writer in creating
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the number of outer electrons and the position of an element in the periodic table Topic 2 Ionic compounds and analysis ● Demonstrate an understanding that atoms of different elements can combine to form compounds by the formation of new chemical bonds ● Describe how ionic bonds are formed by the transfer of electrons to produce cations and anions ● Describe an ion as an atom or group of atoms
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Compound Word List #1 A Compound Word is 2 words into 1 word. | | lifetime | elsewhere | upside | grandmother | cannot | baseball | fireworks | passport | together | become | became | sunflower | crosswalk | basketball | sweetmeat | superstructure | moonlight | football | railroad | rattlesnake | anybody | weatherman | throwback | skateboard | meantime | earthquake | everything | herein | sometimes | also | backward | schoolhouse | butterflies | upstream | nowhere |
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-Sensitivity Analysis. HMG is considering the manufacture of a new chemical compound that is used to make high-pressure plastic containers. An investment of $4 million in plant and equipment is required. The firm estimates that the investment will have a five year life, using straight-line depreciation towaard a zero salvage value. However, the investment has an anticipated salvage equal to 10% of its original cost. The number of pounds of the chemical compound that HMG expects to sell over the five year life
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Biology The study of life Characteristics of Life #1 Made of 1 or more cells: -cells are the smallest units of life -ex: bacteria (1 cell) -ex: humans (trillions of cells) Characteristics of Life #2 Reproduction: -reproduce and pass on genetic material to next generation Characteristics of Life #3 Maintain homeostasis (balance): -homeostasis: balance with organism -ex: regulating body temerature Characteristics of Life #4 Require energy: -cells require
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Introduction: N-Heterocyclic carbenes, also refered to as NHC, are stable singlet carbenes that can act as excellent two electron donor ligands towards almost any element in the periodic table. They coordinate strongly to late transition metals and heavy main group elements, but are also known to bind to early transition metals and the lanthanoids. However, there are alternative methods to prepare air- and moisture-stable species that can be used to transfer carbenes to other metals. In particular
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Element Brochure For this assignment, you will be creating a brochure about an element that you decide to do. Use the internet to collect information about your element. Include all the required information and do your best! Your brochure should be fun and interesting to read. The assignment is due 20/09/1998, at the end of lesson 1. When you have finished this assignment, email me a copy and give me a print out. Information should include: * The element name * The element symbol
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